10 
Psyche 
[Mar. 
sides. Fifth tergum with a large silvery gray spot on 
each side occupying posterior half of segment, these are 
rather narrowly separated in the middle. First tergnm 
with four or more strong black bristles on each side. 
Abdomen otherwise very sparsely haired. Hypopygium: 
Asymmetrical, developed toward the right side and with 
an elongate membranous area at the apex (Fig. 6d). The 
hypopygium, from dorsal view is about equal to slightly 
longer than the fifth abdominal segment. The seventh 
tergum is poorly developed, scarcely visible from a dorsal 
view. The eighth tergum is brown in color, the coxopo- 
dite and harpagones are yellow brown. The harpagones 
are short and broad and appear to be blunt at apices. 
Length: Body, 5. 2-5. 5 mm.; wings, 6.7-7. 5 mm. 
Female: The front is entirely silvery. At its widest 
portion it is scarcely more than half as wide as the face 
just above the mouthparts. Front gradually narrowed, 
at the ocellar triangle it is about equal to the width of 
one ocellus. The coxae are yellow and the apical subseg- 
ments of the tarsi lighter brown than in the males. The 
tarsal claws and pulvilli are very strongly developed 
especially on the front two pairs of legs, about equal in 
length to the last three subsegments of tarsus. Each 
subsegment of posterior tarsi is produced into a moder- 
ately strong spur-like projection at the apex above (Fig. 
6a). The abdomen is rather clavate in shape, being 
widest at segments four to five. The sides of the abdomen 
are yellowish brown in ground color with the gray side 
spots as in the male. The gray markings of the fifth 
tergum are rather broadly joined on the hind margin and 
the sixth is all gray except for a small basal portion which 
is brown. Hind margin of sixth tergum not excised. 
Ovipositor base rather globose, swollen above and below. 
Base chiefly polished bright red, covered with white 
pubescence on the anterior portion. Piercer straight, 
yellow, about equal in length to its base and extending 
slightly beyond apex of the third abdominal segment 
(Fig. 6c). Length: Body, 5.0 mm.; wings, 6.0 mm. 
Holotype male : Barro Colorado, Canal Zone, Panama, 
July 17, 1924 (N. Banks). Allotype female: Ancon, 
